[all-commits] [llvm/llvm-project] 06bb8c: [VPlan] Explicitly handle scalar pointer induction...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 06bb8c9f202e37f215b26ca0dd9b2d8adaf5a83d
      https://github.com/llvm/llvm-project/commit/06bb8c9f202e37f215b26ca0dd9b2d8adaf5a83d
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-03-26 (Tue, 26 Mar 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/lib/Transforms/Vectorize/VPlanAnalysis.cpp
    M llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/test/Transforms/LoopLoadElim/versioning-scev-invalidation.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/epilog-vectorization-widen-inductions.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-epilog-vect.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-live-out-pointer-induction.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-widen-gep.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-widen-phi.ll
    M llvm/test/Transforms/LoopVectorize/X86/gather_scatter.ll
    M llvm/test/Transforms/LoopVectorize/X86/interleave-opaque-pointers.ll
    M llvm/test/Transforms/LoopVectorize/X86/small-size.ll
    M llvm/test/Transforms/LoopVectorize/consecutive-ptr-uniforms.ll
    M llvm/test/Transforms/LoopVectorize/first-order-recurrence.ll
    M llvm/test/Transforms/LoopVectorize/pointer-induction-unroll.ll
    M llvm/test/Transforms/LoopVectorize/pointer-induction.ll
    M llvm/test/Transforms/LoopVectorize/tail-folding-vectorization-factor-1.ll
    M llvm/test/Transforms/LoopVectorize/vplan-printing-before-execute.ll
    M llvm/test/Transforms/LoopVectorize/vplan-sink-scalars-and-merge.ll
    M llvm/test/Transforms/PhaseOrdering/ARM/arm_mult_q15.ll

  Log Message:
  -----------
  [VPlan] Explicitly handle scalar pointer inductions. (#83068)

Add a new PtrAdd opcode to VPInstruction that corresponds to
IRBuilder::CreatePtrAdd, which creates a GEP with source element type
i8.

This is then used to model scalarizing VPWidenPointerInductionRecipe by
introducing scalar-steps to model the index increment followed by a
PtrAdd.

Note that PtrAdd needs to be able to generate code for only the first
lane or for all lanes. This may warrant introducing a separate recipe
for scalarizing that can be created without relying on the underlying
IR.

Depends on https://github.com/llvm/llvm-project/pull/80271

PR: https://github.com/llvm/llvm-project/pull/83068



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